l-i'2 BULLETIN OF THE 



Dimensions of a female specimen: Length of carapax, 0.22 ; breadth, 

 0.30 inch ; proportion, 1 : 1.3&. 



Found at tlic Tortugas. 



Pilumnus lacteus nov. sp. 



Closely allied to /'. gemmaius Stm. (Notes on North American Crus- 

 tacea, p. 86), and like that specie- covered with a whitish or cream-colored, 

 velvet-like pubescence. It differs in the mure spiniform shape of the 

 antero-lateral teeth of the carapax, in the less numerous tubercles on the 

 carapax and chelipeds, in the want of tubercles on the superior margin oi 

 the orbit, and in the smooth, glabrous outer surface of the hands, which i< 

 li'iht red in color. The lobes of the front also are more triangular and 

 pointed. 



Dimensions of a male: Length of carapax, 0.31; breadth, 0.44 inch; 

 proportion, 1 : 1.42. 



Found on the reef at Cruz del Padre, Cuba, and at Key West in from 

 ■_' to 5 tii thorns. 



Pilumnus Agassizii nov. sp. 



Carapax convex, and with the anterior two thirds deeply areolatcd; 

 areolets protuberant. Surface pubescent everywhere, except on the 

 anterior and antero-lateral areolets, which are naked and thickly granu- 

 lated. The depressions between the protuberant areolets are broad, 

 occupying fully as much space as the areolets themselves. Tun of the 

 areolets form the lobes of the front, which are as large and prominent as 

 the epigastric lobes, or even larger. The frontal surface i> vertical, and 

 not much projecting, hut the lobes are deeply separated from each other 

 and from the orbits. Orbital region protuberant and granulated : margin 

 not toothed, but crenulated with granules, and marked by two fissures 

 above and two less conspicuous ones below. The antero lateral margin 

 behind the orbit is armed with three triangular, acute, equal teeth of mod- 

 erate size. Subhepatic tooth distinct. Chelipeds stout, short, and thick : 

 carpus covered above with granulated tubercles which are confluent ex- 

 teriorly, forming transverse ridges; hand covered above and on the outer 

 side with small but prominent maminillary tubercles, having their apices 

 pointing forwards. Ambulatory feel pubescent and hairy; penult and 

 antepenult joint- armed with minute spine- above. 



Dimensions of a male: Length of carapax, 0.65 ; breadth, 0.83 inch; 

 proportion, 1 : 1.28. 



This species has some little resemblance to P. gemrnatus, bul the pro- 

 tuberances of the carapax are densel) granulated instead of sparsely 

 tuberculated. 



